Datasheet

AD9649
Rev. 0 | Page 13 of 32
AD9649-65
AVDD = 1.8 V; DRVDD = 1.8 V, maximum sample rate, 2 V p-p differential input, 1.0 V internal reference; AIN = −1.0 dBFS, 50% duty cycle
clock, unless otherwise noted.
0
–15
–30
–45
–60
–75
–90
–105
–120
3 6 9 12151821242730
FREQUENCY (MHz)
AMPLITUDE (dBFS)
4
3
5
6
2
65MSPS
9.7MHz @ –1dBFS
SNR = 73.5dB (74.5dBFS)
SFDR = 97.7dBc
08539-030
Figure 16. AD9649-65 Single-Tone FFT with f
IN
= 9.7 MHz
0
–15
–30
–45
–60
–75
–90
–105
–120
3 6 9 12151821242730
FREQUENCY (MHz)
AMPLITUDE (dBFS)
4
35
2
6
65MSPS
70.3MHz @ –1dBFS
SNR = 72.6dB (73.6dBFS)
SFDR = 94.1dBc
08539-032
Figure 17. AD9649-65 Single-Tone FFT with f
IN
= 70.3 MHz
0
–15
–30
–45
–60
–75
–90
–105
–120
3 6 9 12151821242730
FREQUENCY (MHz)
AMPLITUDE (dBFS)
65MSPS
30.5MHz @ –1dBFS
SNR = 73.3dB (74.3dBFS)
SFDR = 99.3dBc
4
3
5
6
2
08539-031
Figure 18. AD9649-65 Single-Tone FFT with f
IN
= 30.5 MHz
120
SNR
SNRFS
SFDR
SFDRFS
100
80
60
40
20
0
–90 –80 –60 –40 –20 0
INPUT AMPLITUDE (dBFS)
SNR/SFDR (dBFS)
08539-060
Figure 19.AD9649-65 SNR/SFDR vs. Input Amplitude (AIN) with f
IN
= 9.7 MHz
100
90
80
70
60
50
40
30
20
10
0
0 50 100 150 200
INPUT FREQUENCY (MHz)
SNR/SFDR (dBFS/dBc)
SFDR (dBc)
SNR (dBFS)
08539-056
Figure 20. AD9649-65 SNR/SFDR vs. Input Frequency (AIN)
with 2 V p-p Full Scale